The issue with random tech is he or she may haven't heard about thermal fixing. Most likely they propose 'classical' fix: strip fingerboard, replane the neck, put new fb and intall new frets. Cost is about 3 times as your bass if not more. On the other side thermal treatment is not invasive and can even be done at home, if you have the source of 75-90 deg. C with enough room for entire neck. I've used active ironing board my wife has for example.